EP1210241A1 - Reconfigurable modular instrument cluster arrangement - Google Patents

Reconfigurable modular instrument cluster arrangement

Info

Publication number
EP1210241A1
EP1210241A1 EP00955668A EP00955668A EP1210241A1 EP 1210241 A1 EP1210241 A1 EP 1210241A1 EP 00955668 A EP00955668 A EP 00955668A EP 00955668 A EP00955668 A EP 00955668A EP 1210241 A1 EP1210241 A1 EP 1210241A1
Authority
EP
European Patent Office
Prior art keywords
instrument panel
vehicle
instrument
cluster
electrical system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00955668A
Other languages
German (de)
French (fr)
Other versions
EP1210241B1 (en
Inventor
David A. Hein
David J. Berels
Arthur W. Hess
Jack S. Palazzolo
Michael J. Heir
John P. Slaven
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lear Corp
Original Assignee
Lear Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lear Corp filed Critical Lear Corp
Publication of EP1210241A1 publication Critical patent/EP1210241A1/en
Application granted granted Critical
Publication of EP1210241B1 publication Critical patent/EP1210241B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K37/00—Dashboards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K37/00—Dashboards
    • B60K37/20—Dashboard panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/0315—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using multiplexing techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/216—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member comprising tether means for limitation of cover motion during deployment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/771—Details
    • H01R12/774—Retainers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/78—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to other flexible printed circuits, flat or ribbon cables or like structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/40—Hardware adaptations for dashboards or instruments
    • B60K2360/46—Electrical connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/828—Mounting or fastening exchangeable modules

Definitions

  • the present invention generally relates to vehicle instrument panels, and more particularly to an integrated instrument cluster design incorporating an improved wiring harness and electronic component design.
  • An instrument panel is the primary driver interface in a vehicle, and operates to provide information to the driver as well as receive various inputs from the driver. Displays and gauges provide information to the driver for everything from speed to the volume on a radio. The location and visibility of these displays can even effect vehicle safety and driver comfort. In addition, some displays can be provided which present additional information such as a display for rear vision cameras. On the receiving side, the switches in the instrument panel control greater than 90% of the functions of the vehicle.
  • An instrument panel also functions as a key component to the interior design of a vehicle.
  • the instrument panel determines an interior personality of the vehicle. Through the selection of surface material and contour as well as types of displays and switches, the interior style can change from a sophisticated luxury vehicle to a muscle car. Because of this importance to interior style, a need exists for an instrument panel having a flexible design architecture that readily supports change in features and configuration to provide a vehicle original equipment manufacturer (OEM) with the ability to produce different vehicle brands and create niche vehicles.
  • OEM original equipment manufacturer
  • an instrument panel For an instrument panel to be accepted by an OEM, it must meet vehicle cost targets.
  • the instrument panel needs to be cost effective not only on a high option vehicle, but also across an entire range of vehicle options.
  • integration of electrical, electronic, and mechanical components can reduce cost due to elimination of parts and labor, an integrated system can also have a detrimental impact on give-away and repair cost.
  • conventional electrical systems are provided with a minimum amount of wiring and electronics on the vehicle.
  • "Give-away content" results from manufacturers building-in design support flexibility by integrating high end functions into a low content vehicle's base electronics and wiring. In other words, modules or wiring are placed on vehicles independent of whether a particular vehicle will ultimately include higher end features. In order to create a system that is cost effective on a low end vehicle, give-away content needs to be minimized.
  • IP instrument panel
  • a flat flexible wire arrangement is used in place of a conventional type of wire harness.
  • Conventional wiring harnesses only provide a link or connection to one of a possible number of different types of multiplexing arrangements.
  • the flat flexible wire arrangement of the present invention is universal to vehicle applications by providing a link to a plurality of possible multiplexing links irrespective of vehicle type or instrumentation features, optimizes system functions and to reduce total system cost and weight.
  • An electrical system that provides a configurable instrument panel by supporting installation of thin smart switch units at a final stage in the assembly process to configure the feature content of the instrument panel.
  • Features that can be configured include audio system, climate control system, exterior lighting and more. All configuration of the features in the instrument panel can be completed in a "Just- In-Time" assembly plant within minutes.
  • a system that is easily upgraded by allowing features such as an automobile personal computer (Auto PC), CD player, and automatic headlamps to be changed at a dealer location, or easily reconditioned after a vehicle is returned from a lease.
  • Auto PC automobile personal computer
  • CD player CD player
  • headlamps automatic headlamps
  • a configurable instrument cluster arrangement in conjunction with the flat flexible wire arrangement wherein the cluster arrangement is formed from individual plug-in modules or gauges to allow easy configuration of the instrument cluster for regional and vehicle content without the need for a customized wiring harness and electrical system for each configuration.
  • the present invention provides a configurable instrument panel design providing integrated component designs so that an instrument panel can be configured for a specific vehicle content as late in the vehicle assembly process as possible.
  • a vehicle can have any one of the following headlamp switches: (1) headlamps; (2) headlamps with auto lamps, (3) headlamps with fog lamps; and (4) headlamps with auto lamps and fog lamps.
  • headlamp switches (1) headlamps; (2) headlamps with auto lamps, (3) headlamps with fog lamps; and (4) headlamps with auto lamps and fog lamps.
  • a change in the headlamp switch, wiring and the bezel in the instrument panel are required to change between these available switch types.
  • a system of switches having pigtails that connect to a main wiring system.
  • the main wiring system is the same for every vehicle independent of vehicle content.
  • a low end switch only connects to the specific wires required. Because of the switch pigtails and a multiplexed main wiring system, the system can provide for low option vehicles at a lower cost than conventional technology.
  • Thin smart switch units can be installed at a final stage in the instrument panel assembly process to configure the feature content of the instrument panel.
  • Features that can be configured include selecting between different types of audio system, climate control system, and integrated instrument panel.
  • FIGURE 1 is an exploded diagram of a configurable and integrated instrument panel having an electronics and electrical system in accordance with the present invention
  • FIGURE 2 is a representation of a flat flexible wiring harness in accordance with an exemplary embodiment of the present invention
  • FIGURE 3 is a block circuit diagram of a base electronics configuration in accordance with one embodiment of the present invention.
  • FIGURE 4 is a block circuit diagram of smart junction box and switch arrangement
  • FIGURE 5 is a block circuit diagram of smart junction box and smart switch arrangement.
  • a configurable instrument panel 10 in accordance with the present invention includes a wiring and electronics system provided by a generic instrument gauge/display cluster subcomponent 12 arranged to receive one or more separate modular gauges 14, a flat flexible cable (FFC) 16 that is generic for all potential configurations of the instrument panel and electronic components, a smart junction box 18, and a set of electronic modules such as a headlamp switch 20, ignition switch 22, CD player 24, and multi-function switch 26 located on a steering column 28. Each module connects to FFC 16 using an appropriately configured quick-connect type connector 30.
  • FFC flat flexible cable
  • each connector 30 is also selectively configured to allow a particular module to be connected to appropriate wires provided by FFC 16 depending on the type and features of a selected module.
  • FFC 16 is arranged to be uniform to all potential configurations of the instrument panel and electronic components. As a result, each module can be substituted for a module having different features or function, and still be connected to the same FFC 16.
  • Examples of possible electronic modules include a center stack 38 can be provided on instrument panel 10 via a flexible circuit board 40 having appropriate switches integrated therein.
  • a detachable outer cover 42 supports mounting CD player 24 as well as a modular radio control unit 44 and HVAC control unit 46.
  • ignition switch module 22 can be provided having low current switches and integrated theft prevention electronic control capability.
  • Headlamp switch unit 20 can be used having low current switches and integrated electronic controls.
  • Multifunction switch 26 can include a switch assembly arranged to control operation of the vehicle's turn signals, wiper/washer, headlamp high beam selection, as well as providing a connection for a driver side air bag (not shown).
  • each of the individual gauge and display modules of the instrument cluster are connected using a pin style connector 32 that is uniform to all possible modules. These pins mate with an associated receiving socket 34 that connects to FFC 16.
  • the type and features of a given instrument cluster module determine which of the respective pins 32 are made “live, " i.e. , connected to a circuit element in the module.
  • the use of a universal pine connector and receiving socket arrangement, in connection with FFC 16 as described more fully below, allows easy substitution and upgrade of the instrument cluster as the vehicle is being assembled.
  • the instrument cluster further includes an instrument cluster housing or can 36. In a preferred embodiment, instrument cluster housing 36 is integrally molded as part of a plastic cross car beam.
  • the instrument cluster can be formed using a separate housing.
  • a connector and wiring arrangement such as a printed circuit board having the receiving sockets soldered thereto, is mounted within an opening formed in the instrument cluster can.
  • the opening allows insertion and connection of the respective instrument cluster modules. Examples of such modules include a speedometer, tachometer, fuel, oil pressure, temperature gauge, as well as ELD or other types of video displays and gauges.
  • the FFC is then preferably positioned within the instrument panel behind the cluster housing 36, and the housing includes apertures through which crimps or socket 34 can extend for receiving pins 32 of a particular cluster module. Snaps (not shown) may also be provided to hold the modules/gauges in position within the cluster housing.
  • the integrated electrical system of the present invention is cost effective on a low option vehicle while also providing support for easy upgrade to high option vehicles. More specifically, the present invention provides a cost effective capability on a low option vehicle by minimizing the amount of wiring and electronics of the base electrical system architecture needed to allow simple substitution or addition of a particular electronic instrument panel module or instrument cluster module. As described below, the electrical system of the present invention allows all potential vehicle instrument panel configurations and feature packages to automatically include the wiring and control capability that allows higher-level option modules to be simply plugged-in to the desired opening in the instrument cluster or instrument panel.
  • the electrical system architecture of the present invention includes a plurality of different multiplex links used in the industry based on the sophistication and processing capability of a particular electronic device. More specifically, in a preferred embodiment, three separate multiplex links are built-in to the FFC and electrical system to reduce system give-away content.
  • a base local multiplex link connects smart junction box 18 located on an A-pillar to a series of switches, smart switches, displays, and actuators. Communication between the electronic devices is controlled by the local multiplexing link in such a lowest option/base configuration vehicle.
  • An ITS Data Bus (IDB) link is used for electronic components typically offered in the highest option vehicles. IDB links are commonly used to link after-market products into an existing electrical system.
  • Medium option vehicles can utilize a built-in Body multiplexing link which allows communication control through a centralized vehicle controller.
  • the local multiplex link allows smart switches, displays and actuators to be implemented with low cost electronics. Such components can be implemented without a microprocessor as part of the circuit.
  • the local multiplex link also enables a reduction in wiring as well as allowing upgrade or addition of features into a vehicle at minimum cost.
  • FIG. 1 illustrates an exemplary layout and connection diagram of FFC 16 in accordance with this invention.
  • the FFC connects common signals between all the devices.
  • a 40 circuit FFC as shown in Figure 10 replaces more than 170 circuits of wiring that would be needed in a conventional wiring system.
  • the FFC harness of the present invention dramatically reduces wiring cost and weight, while also providing uniformity for all vehicle option packages.
  • FIG. 3 A block circuit diagram is shown in Figure 3 for the lowest options/base wiring configuration of the present invention.
  • a microcontroller 100 is located at smart junction box 18, and is connected to various input devices 102, such as ignition switch 22, multi-function switch 26, a bezel switch 104, an HDLP 106, and various temperature sensors 108, via a data-in line 110, a clock line 112, and a latch clock line 114.
  • Various output devices 103 such as a set of gauges/electronic displays 14 in instrument cluster 12, e.g. a temperature gauge 116, speedometer 118, fuel gage, 120, and an icon driver 122 for a display device, are connected to microcontroller 100 via a data line 124 and a chip enable/address line 126.
  • An illumination line 128 allows power for illumination of desired input and output devices. Construction and operation of each of the devices is understood by one of ordinary skill in the art.
  • FIG. 4 a block circuit diagram is provided showing connection of a conventional electronic control switch module 200 to the microcontroller.
  • a set of input filters 202 and a shift register 204 are provided in smart junction box 18 to facilitate input of signaling from the switch module.
  • a processing capacity can be built-in by incorporating one or more additional filters 206.
  • FIG. 5 An alternative arrangement is shown in the block circuit diagram of Figure 5.
  • a smart switch module 208 is provided having local input filters 210 and a local multiplexer 212 incorporated therein.
  • the multiplexer is then directly connected to the microcontroller via the FFC.
  • the placement of the multiplexer in the smart switch advantageously reduces the number of individual wires required by the electrical system. This is shown by contrasting the number of wires connecting switch cluster module 200 with the number of wires connecting switch module 208.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Instrument Panels (AREA)

Abstract

A configurable instrument panel design is provided that integrates component designs so that an instrument panel (10) can be configured for a specific vehicle content as late in the vehicle assembly process as possible. An electrical system and modular instrument cluster (12) are provided that utilize the same flat flexible cable (16) for every vehicle independent of vehicle content. Instrument cluster modules (20, 22, 24, 26) are provided with universal connector arrangement (30), where the type and function of a particular module determine which connectors are live. A plurality of different multiplexing links are built-in to the electrical system and wiring arrangement allowing the system to be universal across all possible instrument cluster configurations. This allows the system to accommodate lower option vehicles at a lower cost than conventional technology. Instrument cluster features can be configured at the time of assembly, all without customizing the electrical system and wiring arrangement.

Description

RECONFIGURABLE MODULAR INSTRUMENT CLUSTER ARRANGEMENT
TECHNICAL FIELD
The present invention generally relates to vehicle instrument panels, and more particularly to an integrated instrument cluster design incorporating an improved wiring harness and electronic component design.
BACKGROUND ART
An instrument panel is the primary driver interface in a vehicle, and operates to provide information to the driver as well as receive various inputs from the driver. Displays and gauges provide information to the driver for everything from speed to the volume on a radio. The location and visibility of these displays can even effect vehicle safety and driver comfort. In addition, some displays can be provided which present additional information such as a display for rear vision cameras. On the receiving side, the switches in the instrument panel control greater than 90% of the functions of the vehicle.
An instrument panel also functions as a key component to the interior design of a vehicle. The instrument panel determines an interior personality of the vehicle. Through the selection of surface material and contour as well as types of displays and switches, the interior style can change from a sophisticated luxury vehicle to a muscle car. Because of this importance to interior style, a need exists for an instrument panel having a flexible design architecture that readily supports change in features and configuration to provide a vehicle original equipment manufacturer (OEM) with the ability to produce different vehicle brands and create niche vehicles.
For an instrument panel to be accepted by an OEM, it must meet vehicle cost targets. The instrument panel needs to be cost effective not only on a high option vehicle, but also across an entire range of vehicle options. Although integration of electrical, electronic, and mechanical components can reduce cost due to elimination of parts and labor, an integrated system can also have a detrimental impact on give-away and repair cost. More specifically, in order to be cost effective on a low option vehicle, conventional electrical systems are provided with a minimum amount of wiring and electronics on the vehicle. "Give-away content" results from manufacturers building-in design support flexibility by integrating high end functions into a low content vehicle's base electronics and wiring. In other words, modules or wiring are placed on vehicles independent of whether a particular vehicle will ultimately include higher end features. In order to create a system that is cost effective on a low end vehicle, give-away content needs to be minimized.
Therefore, a need exists for an instrument panel design having a wiring harness and electronic components and system that is able to cost effectively overcome each of these problems.
DISCLOSURE OF INVENTION
It is therefore an object of the present invention to provide an instrument panel (IP) electronic and electrical system that addresses the above needs by providing the following enumerated features.
A flat flexible wire arrangement is used in place of a conventional type of wire harness. Conventional wiring harnesses only provide a link or connection to one of a possible number of different types of multiplexing arrangements. The flat flexible wire arrangement of the present invention is universal to vehicle applications by providing a link to a plurality of possible multiplexing links irrespective of vehicle type or instrumentation features, optimizes system functions and to reduce total system cost and weight.
Electronics that are integrated into components such as switches, smart switches and a junction box to reduce overall instrument panel wiring and components while maintaining conventional low cost serviceability. The integration of the instrument panel electronics also reduces the total number of connectors and terminals while improving package efficiency.
An electrical system that provides a configurable instrument panel by supporting installation of thin smart switch units at a final stage in the assembly process to configure the feature content of the instrument panel. Features that can be configured include audio system, climate control system, exterior lighting and more. All configuration of the features in the instrument panel can be completed in a "Just- In-Time" assembly plant within minutes.
A system that is easily upgraded by allowing features such as an automobile personal computer (Auto PC), CD player, and automatic headlamps to be changed at a dealer location, or easily reconditioned after a vehicle is returned from a lease.
A configurable instrument cluster arrangement in conjunction with the flat flexible wire arrangement, wherein the cluster arrangement is formed from individual plug-in modules or gauges to allow easy configuration of the instrument cluster for regional and vehicle content without the need for a customized wiring harness and electrical system for each configuration.
In accordance with these and other objects, the present invention provides a configurable instrument panel design providing integrated component designs so that an instrument panel can be configured for a specific vehicle content as late in the vehicle assembly process as possible. For example a vehicle can have any one of the following headlamp switches: (1) headlamps; (2) headlamps with auto lamps, (3) headlamps with fog lamps; and (4) headlamps with auto lamps and fog lamps. On a typical vehicle, a change in the headlamp switch, wiring and the bezel in the instrument panel are required to change between these available switch types.
In accordance with one aspect of the present invention, a system of switches is provided having pigtails that connect to a main wiring system. In accordance with the present invention, the main wiring system is the same for every vehicle independent of vehicle content. A low end switch only connects to the specific wires required. Because of the switch pigtails and a multiplexed main wiring system, the system can provide for low option vehicles at a lower cost than conventional technology. Thin smart switch units can be installed at a final stage in the instrument panel assembly process to configure the feature content of the instrument panel. Features that can be configured include selecting between different types of audio system, climate control system, and integrated instrument panel.
These and other advantages of the present invention will become apparent to one of ordinary skill in the art in light of the following description and attached drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIGURE 1 is an exploded diagram of a configurable and integrated instrument panel having an electronics and electrical system in accordance with the present invention; FIGURE 2 is a representation of a flat flexible wiring harness in accordance with an exemplary embodiment of the present invention;
FIGURE 3 is a block circuit diagram of a base electronics configuration in accordance with one embodiment of the present invention;
FIGURE 4 is a block circuit diagram of smart junction box and switch arrangement; and
FIGURE 5 is a block circuit diagram of smart junction box and smart switch arrangement.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to Figure 1 , a configurable instrument panel 10 in accordance with the present invention includes a wiring and electronics system provided by a generic instrument gauge/display cluster subcomponent 12 arranged to receive one or more separate modular gauges 14, a flat flexible cable (FFC) 16 that is generic for all potential configurations of the instrument panel and electronic components, a smart junction box 18, and a set of electronic modules such as a headlamp switch 20, ignition switch 22, CD player 24, and multi-function switch 26 located on a steering column 28. Each module connects to FFC 16 using an appropriately configured quick-connect type connector 30.
Regarding the electronic components of instrument panel 10, each connector 30 is also selectively configured to allow a particular module to be connected to appropriate wires provided by FFC 16 depending on the type and features of a selected module. In accordance with the present invention, FFC 16 is arranged to be uniform to all potential configurations of the instrument panel and electronic components. As a result, each module can be substituted for a module having different features or function, and still be connected to the same FFC 16.
Examples of possible electronic modules include a center stack 38 can be provided on instrument panel 10 via a flexible circuit board 40 having appropriate switches integrated therein. A detachable outer cover 42 supports mounting CD player 24 as well as a modular radio control unit 44 and HVAC control unit 46. In addition, ignition switch module 22 can be provided having low current switches and integrated theft prevention electronic control capability. Headlamp switch unit 20 can be used having low current switches and integrated electronic controls. Multifunction switch 26 can include a switch assembly arranged to control operation of the vehicle's turn signals, wiper/washer, headlamp high beam selection, as well as providing a connection for a driver side air bag (not shown).
With respect to the instrument cluster, each of the individual gauge and display modules of the instrument cluster are connected using a pin style connector 32 that is uniform to all possible modules. These pins mate with an associated receiving socket 34 that connects to FFC 16. The type and features of a given instrument cluster module determine which of the respective pins 32 are made "live, " i.e. , connected to a circuit element in the module. The use of a universal pine connector and receiving socket arrangement, in connection with FFC 16 as described more fully below, allows easy substitution and upgrade of the instrument cluster as the vehicle is being assembled. The instrument cluster further includes an instrument cluster housing or can 36. In a preferred embodiment, instrument cluster housing 36 is integrally molded as part of a plastic cross car beam. However, this is not to be construed as limiting as the instrument cluster can be formed using a separate housing. A connector and wiring arrangement, such as a printed circuit board having the receiving sockets soldered thereto, is mounted within an opening formed in the instrument cluster can. The opening allows insertion and connection of the respective instrument cluster modules. Examples of such modules include a speedometer, tachometer, fuel, oil pressure, temperature gauge, as well as ELD or other types of video displays and gauges. The FFC is then preferably positioned within the instrument panel behind the cluster housing 36, and the housing includes apertures through which crimps or socket 34 can extend for receiving pins 32 of a particular cluster module. Snaps (not shown) may also be provided to hold the modules/gauges in position within the cluster housing.
The integrated electrical system of the present invention is cost effective on a low option vehicle while also providing support for easy upgrade to high option vehicles. More specifically, the present invention provides a cost effective capability on a low option vehicle by minimizing the amount of wiring and electronics of the base electrical system architecture needed to allow simple substitution or addition of a particular electronic instrument panel module or instrument cluster module. As described below, the electrical system of the present invention allows all potential vehicle instrument panel configurations and feature packages to automatically include the wiring and control capability that allows higher-level option modules to be simply plugged-in to the desired opening in the instrument cluster or instrument panel.
The electrical system architecture of the present invention includes a plurality of different multiplex links used in the industry based on the sophistication and processing capability of a particular electronic device. More specifically, in a preferred embodiment, three separate multiplex links are built-in to the FFC and electrical system to reduce system give-away content. For example, a base local multiplex link connects smart junction box 18 located on an A-pillar to a series of switches, smart switches, displays, and actuators. Communication between the electronic devices is controlled by the local multiplexing link in such a lowest option/base configuration vehicle. An ITS Data Bus (IDB) link is used for electronic components typically offered in the highest option vehicles. IDB links are commonly used to link after-market products into an existing electrical system. Medium option vehicles can utilize a built-in Body multiplexing link which allows communication control through a centralized vehicle controller.
The local multiplex link allows smart switches, displays and actuators to be implemented with low cost electronics. Such components can be implemented without a microprocessor as part of the circuit. The local multiplex link also enables a reduction in wiring as well as allowing upgrade or addition of features into a vehicle at minimum cost.
The smart switches, displays, and actuators are connected to the smart junction box through FFC 16. Figure 2 illustrates an exemplary layout and connection diagram of FFC 16 in accordance with this invention. The FFC connects common signals between all the devices. Using the three separate multiplexing circuits note-above, a 40 circuit FFC as shown in Figure 10 replaces more than 170 circuits of wiring that would be needed in a conventional wiring system. Thus, the FFC harness of the present invention dramatically reduces wiring cost and weight, while also providing uniformity for all vehicle option packages.
A block circuit diagram is shown in Figure 3 for the lowest options/base wiring configuration of the present invention. In this embodiment, a microcontroller 100 is located at smart junction box 18, and is connected to various input devices 102, such as ignition switch 22, multi-function switch 26, a bezel switch 104, an HDLP 106, and various temperature sensors 108, via a data-in line 110, a clock line 112, and a latch clock line 114. Various output devices 103, such as a set of gauges/electronic displays 14 in instrument cluster 12, e.g. a temperature gauge 116, speedometer 118, fuel gage, 120, and an icon driver 122 for a display device, are connected to microcontroller 100 via a data line 124 and a chip enable/address line 126. An illumination line 128 allows power for illumination of desired input and output devices. Construction and operation of each of the devices is understood by one of ordinary skill in the art.
Referring now to Figure 4, a block circuit diagram is provided showing connection of a conventional electronic control switch module 200 to the microcontroller. In this configuration, a set of input filters 202 and a shift register 204 are provided in smart junction box 18 to facilitate input of signaling from the switch module. A processing capacity can be built-in by incorporating one or more additional filters 206.
An alternative arrangement is shown in the block circuit diagram of Figure 5. In this arrangement, a smart switch module 208 is provided having local input filters 210 and a local multiplexer 212 incorporated therein. The multiplexer is then directly connected to the microcontroller via the FFC. The placement of the multiplexer in the smart switch advantageously reduces the number of individual wires required by the electrical system. This is shown by contrasting the number of wires connecting switch cluster module 200 with the number of wires connecting switch module 208.
While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.

Claims

WHAT IS CLAIMED IS:
1. A configurable instrument panel cluster for a vehicle instrument panel comprising: an instrument cluster housing; a plurality of plug-in instrument devices each having a mounting pin arranged to mate with a receiving socket mounted to the cluster housing; and a flat flexible cable located within the instrument panel and connected to each receiving socket for connecting the plurality of the plug-in instrument devices to associated sensors or controllers, wherein the flat flexible cable provides a connection to each of a plurality of different multiplex links irrespective of a particular type of instrument device plugged into a receiving socket, each of the plurality of different multiplex links allowing the plurality of plug-in instrument devices to be connected to a selected type of multiplex circuit based on a built-in processing capability of a particular plug-in instrument device.
2. The configurable instrument panel cluster of claim 1 wherein the plurality of multiplex links comprises a separate link to one of three different multiplex circuit arrangements.
3. The configurable instrument panel cluster of claim 1 wherein the plurality of multiplex links comprises a local multiplex link arranged to connect a set of base level electronic components to a vehicle electrical system.
4. The configurable instrument panel cluster of claim 1 wherein the plurality of multiplex links comprises a built-in vehicle multiplexing link arranged to connect a set of mid level electronic components to a vehicle electrical system.
5. The configurable instrument panel cluster of claim 1 wherein the plurality of multiplex links comprises an ITS Data Bus (IDB) multiplexing link arranged to connect a set of high level electronic components to a vehicle electrical system.
6. The configurable instrument panel cluster of claim 1 wherein the plurality of multiplex links comprises a local multiplex link arranged to connect a set of base level electronic components to a vehicle electrical system, a built-in vehicle multiplexing link arranged to connect a set of mid level electronic components to the vehicle electrical system, and an ITS Data Bus (IDB) multiplexing link arranged to connect a set of high level electronic components to the vehicle electrical system.
7. The configurable instrument panel cluster of claim 1 wherein the mounting pin and receiving socket mounted to the cluster housing are universal irrespective of the type and function of a particular plug-in instrument device.
EP00955668A 1999-08-17 2000-08-17 Reconfigurable modular instrument cluster arrangement Expired - Lifetime EP1210241B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US14932399P 1999-08-17 1999-08-17
US149323P 1999-08-17
US09/519,110 US6441510B1 (en) 1999-08-17 2000-03-06 Reconfigurable modular instrument cluster arrangement
US519110 2000-03-06
PCT/US2000/022636 WO2001012459A1 (en) 1999-08-17 2000-08-17 Reconfigurable modular instrument cluster arrangement

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EP1210241A1 true EP1210241A1 (en) 2002-06-05
EP1210241B1 EP1210241B1 (en) 2005-05-04

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EP (1) EP1210241B1 (en)
DE (1) DE60019939T2 (en)
WO (1) WO2001012459A1 (en)

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WO2001012459A1 (en) 2001-02-22
DE60019939D1 (en) 2005-06-09
US6441510B1 (en) 2002-08-27
EP1210241B1 (en) 2005-05-04
DE60019939T2 (en) 2006-03-09

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